A wedding is a lot of planning. It can cost tens of thousands of dollars (in fact the average is between $30K and $20K) and employ a small army of staff for a one day event. A whole industry has grown up around catering to the various needs of weddings, including specially trained organizers. These may be graduates of an event management school, and there’s a good reason why. There may be months of work leading up to a particularly large affair, and since most people only have one wedding in a lifetime they have little practice with this sort of thing. Wedding planners cost extra money, but a good one pays it back with their expertise.